O-ring jammed landing gear in recent Q400 incident

Danish Investigation Board concluded in a preliminary report that the most recent SAS Q400 landing gear malfunction, which caused the airline to pull the turboprops permanently from its fleet (ATWOnline, Oct. 30), was caused by an O-ring that became lodged in the right main gear's actuator, the mechanism that lowers and extends the gear. Investigators determined that this was a different cause than the carrier's two previous Q400 incidents, during which landing gears collapsed as the ...